This is definitely a case of 'don't try this at home' (or at the repair desk).
Cooler Master has experimented with using chocolate spread on a CPU as an alternative to thermal paste, to celebrate International Nuttela Day (no - we didn't know it was a thing either).
The vendor has put together a video of the experiment which we've 'pasted' for you below.
The firm heated the Nutella to begin with and cleaned the CPU, before applying a dab of the chocolate spread.
Surprisingly, the Nutella kept Cooler Master's test processor running at a minimum temperature of 21ºC and a maximum of 50ºC for a while.
However, like we say it's not worth trying this at home as the Nutella will eventually dry out and harm your CPU.
But... it does smell nicer than standard thermal paste.